[OpenAFS] Re: cyrus with storage in afs?

Robert Banz banz@umbc.edu
Tue, 26 Jun 2007 15:13:58 -0400

On Jun 26, 2007, at 15:08, Derrick J Brashear wrote:

> On Tue, 26 Jun 2007, Robert Banz wrote:
>> I personally wouldn't want my mail storage on AFS.  I say that  
>> because, right now, it is, and I can't wait to get it off of it.   
>> It's caused me nothing but problems, because the AFS fileserver  
>> doesn't just seem to be "made" to handle the transactional  
>> intensity of mail-land.  We got around a lot of our performance  
>> issues by moving from a berkeley-based mailspool to a maildir-like  
>> one a couple years ago, but now are always coming up against  
>> performance (leading into stability) issues caused by AFS being  
>> part of the stack.  Less things being part of the stack with your  
>> mail system will make things better; run it on some quality fibre  
>> or iscsi attached storage and you won't end up screaming in pain  
>> later on.
> callback issues, or something else?
> i wouldn't expect corruption issues here, in spite of the question  
> of whether *performance* sucks because you're imposing another  
> network round trip (minimum) in an already-network protocol

No corruption problems (at least in a maildir-like environment), but  
its mostly stuff caused by callback issues now.  As in too many of  
them. ;)